Although the dyno shows it, under WOT you dont really feel it. If you feather the throttle and work its way up in the rpm, you feel this power kick in (not a jolt of any type). That is my favourite part TBH.
The AA tune does a wonderful job of shallowing out the 2 dips to keep that power running strong over a longer period of time.

I have to agree on this....under WOT the car feels sluggish, not sure why but maybe this is how the tune is mapped???
But ones you know how to work the throttle...you feel the power

The dyno temps between the first runs you did compared to the later ones like you stated in the first post make a pretty large difference I wouldn't be surprised if you made 5-10 more in the same climate.

You have one strong n52 congrats

Thanks bud. I'll keep zack in the loop as well here and there.

Quote:

Originally Posted by shoenlace

I've heard the newer 328 with n51 engine comes with 3 stage manifold installed, so the question is will i get the same result with just a PE, PI, and AA tune?

Maybe, your car has a different compression ratio, but I am sure Andrew can fill you in. I don't know if you will have the same torque curve as the n52 with DISA.

Quote:

Originally Posted by andrey_gta

Really like how AA smoothed out that DISA dip.

DESI4life10, I found a DISA that been salvaged off a flood damaged 330i. Should I risk it? How did you verify that the DISA actuators worked??

The price is competitive and in Canada, no border fees

If the price is right, I would do it. What do they mean by floor? Like was the engine submerged in water? or did it take in some water?

To check, you can use a resistance meter and measure the resistance, or plug the DISA in your connectors and rev the rpm (triggers with rpm)

Can't do much there with an NA engine. Look at the difference in hp and tq throughout the cruve..The difference opens up in the midrange (bulk of where you feel the power)

Totally agree. The difference is in the area under the curve, not really the peak numbers as they're just a snapshot at a certain RPM.

I'd also note that the first 2 runs were done at 59 degrees, whereas the last run was done at 84 degrees and 80% humidity. Even with no tune, we can all feel a difference in performance between those conditions.

One thing to note is that Dyno runs 1-2 were done in nice cold climate, 15 deg C (59 deg F), where Dyno run 3 was done in 29deg C (84 deg F) with 80% Humidity. With that being said, I reckon that I should be able to extract about 5-7 more hp and ft-lbs if the temperatures were the same as runs 1-2.

Overall, I am very impressed with how my car has handled the modifications. The manifold alone definitely complimented my car even without a performance tune. The AA stage tune helped to smoothen out the 2 big dips that occur when the DISA actuators engage and also tweaked the AFR to get some more mid-range power.

I have been working with an AA rep to tweak the car and this is pretty much the best we can get for my car (that makes sense). The blip you see in the later stage of Dyno run 3 was due to the wheel speeds registering different speeds on the front wheels and the transfer case locking the wheel to get them to rotate evenly.

The way the car responds is definitely a massive improvement over my stock setup. The power delivery is strong and the throttle response is very sharp and crisp.

The best feeling is when you pass 3500 rpm and the car seems to just pull really hard. One thing for sure is that these cars really run out of power after 6500 rpm.
I have managed to run in line with an 2009 Acura -TL SH AWD (310hp) and both times I took him off the line and continued to open it up (beat him by 1.5 car length).

As for modifications, this car is done and I have no reason to add more power. I am happy with where I am sitting at right now and just going to enjoy the car and maintain it.

My car from the outside is pretty much stock, as I was never into cosmetic modifications. I was more driven with modifications that would benefit the driver (wheels, suspension, sports wheel, and performance modifications)

Now here are some details on the car.

2007 328xi AT
75, 000km (46, 602mi)
e90

Enjoy the results and if you have any questions, please post them below.